> On Jun 13, 2016, at 6:33 PM, Igor PDML-StR <[email protected]> wrote: > > What's the meaning of PLM and RE? > Does this lens have just an electronic aperture control or a dual one? > > What happens if the lens is attached to an older camera, say k-5? It stays > wide open? > > Igor > > Sent from mobile phone > > > Mark Roberts Mon, 13 Jun 2016 12:52:27 -0700 wrote: > >> http://www.dpreview.com/news/8852527391/affordable-reach-ricoh-announces-pentax-55-300mm-f4-5-6-3-lens > > >> Apparently the new Pentax "DA 55-300mm F4.5-6.3ED PLM WR RE" (whew!) >
To amplify Mark’s reply, this from the announcement: > This lens’ KAF4 mount is compatible with an electromagnetic diaphragm control > system. In order to use this lens, the camera’s firmware must be upgraded to > the latest version (except for the PENTAX K-70). Cameras compatible with this > system are: K-1, K-3 II, K-S2 and K-S1. If this lens is mounted on a camera > without proper firmware upgrade, its diaphragm control mechanism becomes > inactive, making it impossible to obtain correct exposure. stan -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
